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 Найдено в других БД:Публикации Чарушина В.Н. (10)
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Поисковый запрос: (<.>K=CHEMOSENSORS<.>)
Общее количество найденных документов : 15
Показаны документы с 1 по 10
 1-10    11-15 
1.
Инвентарный номер: нет.
   
   P 91

   
    Preparation of triazatriphenylene cations, promising chemosensors for nitro compounds [Electronic resource] / D. S. Kopchuk, I. N. Egorov, T. A. Tseitler, A. F. Khasanov, I. S. Kovalev, G. V. Zyryanov, V. L. Rusinov, O. N. Chupakhin // Chemistry of Heterocyclic Compounds. - 2013. - Vol.49, №3. - P503-505. - Библиогр.: с. 505 (10 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
TRIAZATRIPHENYLENE -- CATIONS -- NITRO COMPOUNDS

\\\\expert2\\NBO\\Chemistry of Heterocyclic Compounds\\2013, v.49, N 3, p. 503-505.pdf
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2.
Инвентарный номер: нет.
   
   E 97

   
    Extended cavity pyrene-based iptycenes for the turn-off fluorescence detection of RDX and common nitroaromatic explosives / A. F. Khasanov [et al.] // New Journal of Chemistry. - 2017. - Vol. 41, № 6. - P2309-2320
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
PYRENE (CHEMICAL) -- FLUORESCENCE -- RDX (CYCLONITE)
Аннотация: Extended cavity pyrene-based iptycenes have been synthesized by using the Diels–Alder reaction between in situ generated dehydropyrenes and anthracene. The photophysical properties and the interaction of these iptycenes with nitro-explosive components were studied both in solution and in the solid state by using fluorescence spectroscopy and X-ray crystallography, respectively. Due to the presence of both the large iptycene cavity and the central pyrene core, an unprecedently high fluorescence-quenching response towards non-aromatic and non-planar 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) has been observed both in solution (with an apparent Stern–Volmer constant value aKSV up to 1.53 × 103 M−1) and in the vapor phase (50–75% fluorescence quenching of the PU films doped with chemosensors). In the case of nitroaromatic explosives, nitrobenzene (NB), 2,4-DNT, TNT, and 2,4,6-trinitrophenol (TNP or picric acid, PA), pyrene-based iptycenes also demonstrate a good fluorescence-quenching response both in solutions (with apparent Stern–Volmer constant values aKSV = 0.4–8.0 × 103 M−1) and in the vapor phase (up to 90% fluorescence quenching of the PU films doped with chemosensors). The “sphere of action” fluorescence quenching model was suggested.

\\\\Expert2\\NBO\\New Journal of Chemistry\\2017 v.41 p.2309-2320.pdf
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3.
Инвентарный номер: нет.
   

   
    Synthesis and characterization of linear 1,4-diazine-triphenylamine–based selective chemosensors for recognition of nitroaromatic compounds and aliphatic amines / E. V. Verbitskiy, Y. A. Kvashnin, E. F. Zhilina [et al.] // Dyes and pigments. - 2020. - Vol. 178. - P108344
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ALIPHATIC AMINES -- FLUORESCENCE QUENCHING -- NITROAROMATIC COMPOUNDS -- PYRAZINE -- QUINOXALINE -- SOLVATOCHROMISM
Аннотация: Novel 1,4-diazine-based dyes of the D–π–A type, possessing triphenylamine as an electron-donating group, have been developed. Fluorescence studies have demonstrated that emission of these fluorophores is sensitive towards different nitroaromatic compounds and aliphatic amines, both in solutions and in a vapor phase. Moreover, these compounds can be considered as “naked-eye” fluorescent probes for solution polarity because they possess pronounced solvatochromic properties. Therefore, these compounds have to be regarded as potential multifunctional chemosensors for monitoring hazardous organic substances.

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4.
Инвентарный номер: нет.
   

   
    Bola-type pah-based fluorophores/chemosensors: synthesis via an unusual clemmensen reduction and photophysical studies / I. S. Kovalev, L. K. Sadieva, O. S. Taniya [et al.] // Journal of photochemistry and photobiology A: Chemistry. - 2021. - Vol. 420. - P113466
Рубрики: ХИМИЧЕСКИЕ НАУКИ

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5.
Инвентарный номер: нет.
   

   
    Computer vision vs. spectrofluorometer-assisted detection of common nitro-explosive components with bola-type PAH-based chemosensors / I. S. Kovalev, L. K. Sadieva, O. S. Taniya [et al.] // RSC Advances. - 2021. - Vol. 11, № 42. - P25850-25857
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Computer vision (CV) algorithms are widely utilized in imaging processing for medical and personal electronics applications. In sensorics CV can provide a great potential to quantitate chemosensors' signals. Here we wish to describe a method for the CV-assisted spectrofluorometer-free detection of common nitro-explosive components, e.g. 2,4-dinitrotoluene (DNT) and 2,4,6-trinitrotoluene (TNT), by using polyaromatic hydrocarbon (PAH, PAH = 1-pyrenyl or 9-anthracenyl) – based bola-type chemosensors. The PAH components of these chemical bolas are able to form stable, bright emissive in a visual wavelength region excimers, which allows their use as extended matrices of the RGB colors after imaging and digital processing. In non-polar solvents, the excimers have poor chemosensing properties, while in aqueous solutions, due to the possible micellar formation, these excimers provide “turn-off” fluorescence detection of DNT and TNT in the sub-nanomolar concentrations. A combination of these PAH-based fluorescent chemosensors with the proposed CV-assisted algorithm offers a fast and convenient approach for on-site, real-time, multi-thread analyte detection without the use of fluorometers. Although we focus on the analysis of nitro-explosives, the presented method is a conceptual work describing a general use of CV for quantitative fluorescence detection of various analytes as a simpler alternative to spectrofluorometer-assisted methods.

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6.
Инвентарный номер: нет.
   

   
    Benzo[de]naphtho[1,8-gh]quinolines: synthesis, photophysical studies and nitro explosives detection / I. L. Nikonov, I. A. Khalymbadzha, L. K. Sadieva [et al.] // Chimica Techno Acta. - 2021. - Vol. 8, № 4. - Ст. 20218415
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
BENZO[DE]NAPHTHA [1,8-GH]QUINOLONES -- FLUORESCENCE -- SENSOR -- EXPLOSIVES
Аннотация: A rational synthetic approach to substituted naphtho[1,8-gh]quinolines based on intramolecular cyclization in the presence of potassium in the series of (naphthalen-1-yl)isoquinolines is described. The photophysical properties of the obtained compounds were studied; in particular, fluorescence emission was detected in the range 454-482 nm with a quantum yield of up to 54%. We also calculated the HOMO-LUMO energies and optimized molecular structures for the resulting fluorophores. Based on the results of fluorescence titration, the Stern-Volmer constants (up to 21587 M-1) and the detection limits of nitroanalytes (up to 1.4 ppm) were calculated, confirming the possibility of their use as potential chemosensors for the visual detection of nitro-containing explosives.

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7.
Инвентарный номер: нет.
   

   
    New naphtho[1,8-ef]perimidines: synthesis, fluorescence studies and application for detection of nitroanalytes / I. L. Nikonov, L. K. Sadieva, M. I. Savchuk [et al.] // Chimica Techno Acta. - 2021. - Vol. 8, № 4. - Ст. 20218416
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
NAPHTHO[1,8-EF]PERIMIDINES -- FLUORESCENCE -- SENSOR -- EXPLOSIVES
Аннотация: A rational approach to the synthesis of substituted naphtho[1,8-ef]perimidines based on SNH methodology and cyclization reaction in the series of condensed azines with naphthalene substituents was presented. Photophysical properties of the obtained fluorophores were studied, in particular, green fluorescence in the 485–536 nm range with quantum yield up to 32.4% was detected. HOMO-LUMO energy values and distributions for the new compounds were calculated by the DFT method in comparison with nitroanalytes and perylene. Based on the data obtained, as well as on the results of fluorescence titration, the possibility of using the new diazaperylenes as potential chemosensors for the visual detection of nitro-containing explosives was shown.

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8.
Инвентарный номер: нет.
   

   
    Bispyrenylalkane chemosensor for the naked-eye detection of nitro-explosives / I. S. Kovalev, L. K. Sadieva, O. S. Taniya [et al.] // Chimica Techno Acta. - 2021. - Vol. 8, № 2. - P20218209
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
DETECTION OF EXPLOSIVES IN AQUEOUS MEDIA -- CHEMICAL SENSORS -- FLUORESCENCE QUENCHING -- PYRENE-BASED FLUOROPHORES
Аннотация: Pyrene-based compounds have a great potential as fluorescent chemosensors for various analytes including common nitroexplosives, such as 2,4,6-trinitrotoluene (TNT). Compounds having two pyrene units in one molecule, such as bispyrenylalkanes, are able to form stable, bright emissive in a visual wavelength region excimers both in non-polar and polar environments. In this work we wish to report that in non-polar solvents the excimer has poor chemosensing properties while in aqueous solutions it provides significant “turn-off” fluorescence response to TNT in the subnanomolar concentrations.

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9.
Инвентарный номер: нет.
   

   
    Detection of anti-viral drug riamilovir and herbicides in aqueous media by using pyrene-based fluorescent chemosensors / I. S. Kovalev, L. K. Sadieva, O. S. Taniya [et al.] // Chimica Techno Acta. - 2021. - Vol. 8, № 2. - P20218208
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
COVID-19 -- RIAMILOVIR -- TRIAZAVIRIN -- DETECTION IN AQUEOUS MEDIA -- FLUORESCENCE QUENCHING
Аннотация: Two ethyleneglycol esters of 1-pyrene carboxylic acid were studied as chemosensors for the fluorescence “turn-off” detection of two nitro-containing analytes, such as antiviral drug Riamilovir (Triazavirin ®) and herbicidal agent dinitro-ortho-cresol (DNOC). In both cases the dramatic fluorescence quenching was observed with quenching constants as high as 3·104 M-1 and limits of detection (LOD) as low as 100 ppb.

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10.
Инвентарный номер: нет.
   

   
    Pyrene-based lipophilic/biphilic chemosensors for the fluorescence "turn-off" detection of nitroanalytes in aqueous media / I. S. Kovalev, L. K. Sadieva, O. S. Taniya [и др.] // AIP Conference Proceedings. - 2021. - Vol. 2388, № 1. - Ст. 030015
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Two approaches towards “turn off” fluorescence detection of nitroanalytes (dinitro-ortho-cresol (DNOC), 2,4,6-trinitrotoluene (TNT) and Riamilovir (Triazavirin ®) are reported such as by tuning the chemosensors structure or by changing the environment. In both cases the great response was achieved with Stern-Volmer quenching constants (KSV) as high as 2.28–3.14 × 104 M−1 (for structure modification approach) and 4.67 × 105 M−1 (for changing of environment approach).

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 1-10    11-15 
 
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